Flame retardant resin composition and flame retardant resin molded article manufactured therefrom

Abstract

The present invention relates to a flame retardant resin composition having excellent flame retardancy and improved thermal deformation properties, and a flame retardant resin molded article manufactured therefrom, and provides a flame retardant resin composition including a) a base resin including a polyarylene ether-based polymer; an aromatic vinyl-based polymer and a copolymer of vinylcyan monomer-conjugated diene monomer-aromatic vinyl monomer; b) an organophosphorus-based flame retardant; c) a hypophosphite compound; and d) a sulfur-containing compound including at least two sulfur atoms, wherein b) the organophosphorus-based flame retardant, c) the hypophosphite compound and d) the sulfur-containing compound are included in a weight ratio of 15 to 24:2 to 4:2 to 5.

The invention claimed is: 
     
       1. A flame retardant resin composition, comprising:
 a) a base resin comprising a polyarylene ether-based polymer; an aromatic vinyl-based polymer and a copolymer of vinylcyan-based monomer-conjugated diene-based monomer-aromatic vinyl-based monomer; 
 b) a nonhalogen organophosphorus-based flame retardant; 
 c) a hypophosphite compound; and 
 d) a sulfur-containing compound comprising at least two sulfur atoms, 
 wherein b) the nonhalogen organophosphorus-based flame retardant, c) the hypophosphite compound and d) the sulfur-containing compound are comprised in a weight ratio of 15 to 24:2 to 4:2 to 5, and 
 wherein c) the hypophosphite compound is one or more selected from the group consisting of (3-chloropropyl)phosphinic acid, methyl cyclohexyl phosphinate and n-butyl phenyl phosphinate. 
 
     
     
       2. The flame retardant resin composition of  claim 1 , wherein the flame retardant resin composition comprises: a) 100 parts by weight of the base resin; b) 10 parts by weight to 40 parts by weight of the nonhalogen organophosphorus-based flame retardant; c) 0.1 parts by weight to 5.0 parts by weight of the hypophosphite compound; and d) 1 part by weight to 12 parts by weight of the sulfur-containing compound. 
     
     
       3. The flame retardant resin composition of  claim 1 , wherein b) the nonhalogen organophosphorus-based flame retardant is one or more selected from the group consisting of diphenyl diphosphate, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, resorcinol bis(diphenyl phosphate), phenyl diresorcinol phosphate, bisphenol diphenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate, phenyl di(isopropylphenyl)phosphate, triisophenyl phosphate, diphenyl phosphate, resorcinol diphosphate, and aromatic polyphosphate. 
     
     
       4. The flame retardant resin composition of  claim 1 , wherein d) the sulfur-containing compound is ammonium thiosulfate, 2,2′-dithiobis(benzothiazole), or a mixture thereof. 
     
     
       5. The flame retardant resin composition of  claim 1 , wherein a) the base resin comprises, based on 100 parts by weight of the base resin, 20 parts by weight to 70 parts by weight of the polyarylene ether-based polymer; 20 parts by weight to 70 parts by weight of the aromatic vinyl-based polymer; and 10 parts by weight to 40 parts by weight of the copolymer of vinylcyan monomer-conjugated diene monomer-aromatic vinyl monomer. 
     
     
       6. The flame retardant resin composition of  claim 1 , wherein the polyarylene ether-based polymer is a homopolymer or copolymer comprising a unit represented by the following Formula 2: 
       
         
           
           
               
               
           
         
         in Formula 2, 
         R 3  to R 6  are each independently a hydrogen atom, a halogen group, a hydroxyl group, a cyano group, a nitro group, an alkyl group of 1 to 20 carbon atoms, a cycloalkyl group of 3 to 20 carbon atoms, an aryl group of 6 to 20 carbon atoms, an alkoxy group of 1 to 20 carbon atoms, an arylalkyl group of 7 to 20 carbon atoms, an alkylaryl group of 7 to 20 carbon atoms, an aryloxy group of 6 to 20 carbon atoms, or an alkyl group of 1 to 20 carbon atoms containing Br, Cl or CN, and 
         n is an integer of 4 to 20. 
       
     
     
       7. The flame retardant resin composition of  claim 1 , wherein the polyarylene ether-based polymer is one or more selected from the group consisting of poly(2,6-dimethyl-1,4-phenyleneoxide), poly(2,6-diethyl-1,4-phenyleneoxide), poly(2-methyl-6-ethyl-1,4-phenyleneoxide), poly(2-methyl-6-propyl-1,4-phenyleneoxide), poly(2,6-dipropyl-1,4-phenyleneoxide), poly(2-ethyl-6-propyl-1,4-phenyleneoxide), poly(2,6-dimethoxy-1,4-phenyleneoxide), poly(2,6-di(chloromethyl)-1,4-phenyleneoxide), poly(2,6-di(bromomethyl)-1,4-phenyleneoxide), poly(2,6-diphenyl-1,4-phenyleneoxide), poly(2,6-dichloro-1,4-phenyleneoxide), poly(2,6-dibenzyl-1,4-phenyleneoxide) and poly(2,5-dimethyl-1,4-phenyleneoxide). 
     
     
       8. The flame retardant resin composition of  claim 1 , wherein the aromatic vinyl-based polymer has a weight average molecular weight of 10,000 g/mol to 300,000 g/mol. 
     
     
       9. The flame retardant resin composition of  claim 1 , wherein the copolymer of vinylcyan monomer-conjugated diene monomer-aromatic vinyl monomer is a graft copolymer with a core-shell structure, comprising: a core comprising a derived unit of a conjugated diene monomer; and a shell wrapping the core and comprising a derived unit of an aromatic vinyl monomer and a derived unit of a vinylcyan monomer. 
     
     
       10. The flame retardant resin composition of  claim 1 , wherein the copolymer of vinylcyan monomer-conjugated diene monomer-aromatic vinyl monomer comprises 40 wt % to 60 wt % of the core comprising the derived unit of the conjugated diene monomer; and 40 wt % to 60 wt % of the shell wrapping the core and comprising the derived unit of the aromatic vinyl monomer and the derived unit of the vinylcyan monomer, and
 the shell comprises the derived unit of the aromatic vinyl monomer and the derived unit of the vinylcyan monomer in a weight ratio of 3:97 to 30:70. 
 
     
     
       11. A flame retardant resin molded article manufactured from the flame retardant resin composition of  claim 1 ,
 wherein flammability class measured according to flammability standards of UL-94 VB and a thickness of 2 mm is V-0, and 
 thermal deformation temperature measured under load conditions of 18.5 kg/cm 2  according to ASTM D648 is 80° C. or more.